Three-dimensional variable cross-section airfoil fin heat exchange plate and core structure

Abstract

The application discloses a three-dimensional variable cross-section airfoil fin heat exchange plate core structure, and relates to the technical field of heat exchangers. The heat exchanger core is formed by diffusion welding of a plurality of alternately arranged hot-side heat exchange plates and cold-side heat exchange plates. The hot-side heat exchange plates and the cold-side heat exchange plates are photochemically etched to form three-dimensional variable cross-section airfoil fin structures in the respective interiors. Fluid flow channels are formed between the hot-side heat exchange plates and the cold-side heat exchange plates. The cross-section of the three-dimensional variable cross-section airfoil fin structure is in the shape of a NACA airfoil, and mainly comprises an airfoil fin upper end surface, an airfoil fin 1 / 2 fin height cross-section and an airfoil fin lower end surface. The side walls of the airfoil fin upper end surface and the airfoil fin lower end surface connected to the airfoil fin 1 / 2 fin height cross-section are both smooth curves. The application can effectively reduce the flow resistance of the heat exchanger, improve the comprehensive heat exchange performance of the airfoil flow channel printed circuit board heat exchanger, and reduce the flow loss in the airfoil flow channel.

Description

Technical Field

[0001] The present invention relates to the technical field of high-efficiency compact heat exchangers, and in particular to a three-dimensional variable-section airfoil fin heat exchange plate and a core structure. Background Art

[0002] The printed circuit board heat exchanger (PCHE) is a new, highly efficient, compact heat exchanger with a higher surface area to volume ratio than traditional shell-and-tube heat exchangers. It features a compact structure, high-temperature and high-pressure resistance, and high heat transfer efficiency. PCHEs have broad application prospects in supercritical CO2 cycles in nuclear reactors, solar thermal power generation, and offshore oil and gas development.

[0003] Metal plates are photochemically etched to form millimeter-scale microchannels, and diffusion welding is used to connect the individual metal plates to form the heat exchanger core structure. The flow channel structure is one of the main factors affecting the overall heat transfer performance of a heat exchanger. PCHE flow channel cross-sections mainly include semicircular, circular, rectangular, and trapezoidal shapes. Rectangular cross-sections have the highest heat transfer efficiency, but also the greatest pressure loss. PCHE flow channel structures mainly include straight channels, Z-shaped channels, S-shaped channels, and airfoil-shaped channels. Compared to straight channels, Z-shaped channels offer improved heat transfer performance, but also experience greater pressure loss. Under the same heat transfer efficiency conditions, the pressure loss of S-shaped and airfoil-shaped channels is only 1 / 20 to 1 / 5 of that of Z-shaped channels, indicating that airfoil-shaped channels have superior overall heat transfer performance. However, stagnation of airflow at the leading edge of the airfoil increases pressure loss, leading to increased flow losses within the airfoil flow channel. Summary of the Invention

[0004] In response to the above problems, the present invention proposes a three-dimensional variable-section airfoil fin heat exchange plate and a core structure.

[0005] To achieve the objectives of the present invention, a three-dimensional variable-section airfoil fin heat exchange plate core structure is provided, comprising: a stacked hot-side heat exchange plate and a cold-side heat exchange plate; the hot-side heat exchange plate and the cold-side heat exchange plate are spaced apart from each other above and below each other to form alternating high-temperature fluid channels and low-temperature fluid channels;

[0006] The hot side heat exchange plate comprises: a hot side heat exchange plate body, a hot fluid inlet circular hole and a hot fluid outlet circular hole respectively arranged at both ends of a main diagonal line of the hot side heat exchange plate, a cold fluid inlet circular hole and a cold fluid outlet circular hole respectively arranged at both ends of a secondary diagonal line of the hot side heat exchange plate, and a plurality of high-temperature airfoil fins arranged in a row in the hot side heat exchange plate body along the flow direction of the high-temperature fluid; the hot fluid inlet circular hole and the cold fluid outlet circular hole are located on the same side of the plurality of high-temperature airfoil fins; the hot fluid outlet circular hole and the cold fluid inlet circular hole are located on the same side of the plurality of high-temperature airfoil fins;

[0007] The tips of the high-temperature airfoil fins all point to the outlet direction of the high-temperature fluid channel;

[0008] The cold-side heat exchange plate comprises a cold-side heat exchange plate body, a cold fluid inlet round hole and a cold fluid outlet round hole respectively arranged at two ends of a main diagonal line of the cold-side heat exchange plate, a hot fluid inlet round hole and a hot fluid outlet round hole respectively arranged at two ends of a sub-diagonal line of the cold-side heat exchange plate, and a plurality of low-temperature airfoil fins arranged in the cold-side heat exchange plate body in a column along the low-temperature fluid flow direction; the hot fluid inlet round hole and the cold fluid outlet round hole are located on the same side of the plurality of low-temperature airfoil fins; the hot fluid outlet round hole and the cold fluid inlet round hole are located on the same side of the plurality of low-temperature airfoil fins;

[0009] The tips of the low-temperature airfoil fins all point to the outlet direction of the low-temperature fluid channel;

[0010] The high-temperature airfoil fin and the low-temperature airfoil fin are structurally identical and have a NACA airfoil cross section; the high-temperature airfoil fin and the low-temperature airfoil fin comprise an airfoil fin upper end surface, an airfoil fin 1 / 2 fin height cross section, and an airfoil fin lower end surface; the airfoil fin upper end surface and the airfoil fin lower end surface have equal areas; the airfoil fin upper end surface and the airfoil fin lower end surface are parallel to each other; the airfoil fin upper end surface airfoil chord and the airfoil fin lower end surface airfoil chord are parallel to each other; the area ratio of the airfoil fin 1 / 2 fin height cross section to the airfoil fin upper end surface is 0.25-0.8; the side walls connecting the airfoil fin upper end surface and the airfoil fin lower end surface to the airfoil fin 1 / 2 fin height cross section are smooth curves; the vertical direction projections of the airfoil fin upper end surface airfoil chord midpoint, the airfoil fin lower end surface airfoil chord midpoint, and the airfoil fin 1 / 2 fin height cross section airfoil chord midpoint coincide.

[0011] Further, the hot-side heat exchange plate further comprises a plurality of high-temperature fluid inlet flow guide fins and a plurality of high-temperature fluid outlet flow guide fins; the cold-side heat exchange plate further comprises a plurality of low-temperature fluid inlet flow guide fins and a plurality of low-temperature fluid outlet flow guide fins;

[0012] The plurality of high-temperature fluid inlet flow guide fins and the plurality of high-temperature fluid outlet flow guide fins are respectively arranged on both sides of the plurality of high-temperature airfoil fins; the plurality of high-temperature fluid inlet flow guide fins are located on the side close to the hot fluid inlet round hole; the plurality of high-temperature fluid outlet flow guide fins are located on the side close to the hot fluid outlet round hole;

[0013] The plurality of low-temperature fluid inlet guide fins and the plurality of low-temperature fluid outlet guide fins are respectively arranged on both sides of the plurality of low-temperature airfoil fins; the plurality of low-temperature fluid inlet guide fins are located on the side close to the cold fluid inlet circular hole, and the plurality of low-temperature fluid outlet guide fins are located on the side close to the cold fluid outlet circular hole;

[0014] The number of the high-temperature fluid inlet guide fins is equal to the number of rows of the high-temperature airfoil fins; the high-temperature fluid inlet guide fins correspond to the high-temperature airfoil fins in a one-to-one manner, and the center line of each high-temperature fluid inlet guide fin is collinear with the center line of the high-temperature airfoil fin in its row;

[0015] The number of the high-temperature fluid outlet guide fins is equal to the number of rows of the high-temperature airfoil fins; the high-temperature fluid outlet guide fins correspond to the high-temperature airfoil fins in a one-to-one manner, and the center line of each high-temperature fluid outlet guide fin is collinear with the center line of the high-temperature airfoil fin in its row;

[0016] The number of the plurality of low-temperature fluid inlet guide fins is equal to the number of rows of the plurality of low-temperature airfoil fins; the plurality of low-temperature fluid inlet guide fins correspond to the plurality of low-temperature airfoil fins in a one-to-one manner, and the center line of each low-temperature fluid inlet guide fin is on the same straight line as the center line of the low-temperature airfoil fin in its row;

[0017] The number of the plurality of low-temperature fluid outlet guide fins is equal to the number of columns of the plurality of low-temperature airfoil fins; the plurality of low-temperature fluid outlet guide fins correspond to the plurality of low-temperature airfoil fins in a one-to-one manner, and the center line of each of the low-temperature fluid outlet guide fins is on the same straight line as the center line of the low-temperature airfoil fins in its column.

[0018] Furthermore, the high-temperature airfoil fins and the low-temperature airfoil fins are arranged in a row or a staggered row, and the longitudinal spacing L between adjacent high-temperature airfoil fins or low-temperature airfoil fins is a The range is 5 to 30 mm, and the horizontal spacing Ls range is 2 to 10 mm.

[0019] Furthermore, the hot side heat exchange plate and the cold side heat exchange plate are connected by diffusion welding; the high temperature airfoil fin and the low temperature airfoil fin are formed by photochemical etching;

[0020] The thickness of the hot side heat exchange plate and the cold side heat exchange plate ranges from 3 to 5 mm.

[0021] The length L of the high temperature airfoil fin and the low temperature airfoil fin c Range: 2~10mm; width L tThe range is: 0.5~3mm; the range of fin height H is: 1~3mm.

[0022] Furthermore, the upper end surface of the airfoil fin and the cross section of the airfoil fin at 1 / 2 wing height are parallel to each other; the angle α between the airfoil chord of the upper end surface of the airfoil fin and the airfoil chord of the cross section at 1 / 2 wing height of the airfoil fin in the horizontal direction ranges from 0 to 180°.

[0023] Furthermore, the airfoil chord of the upper end surface of the airfoil fin, the airfoil chord of the lower end surface of the airfoil fin and the airfoil chord of the cross section at 1 / 2 wing height of the airfoil fin are located in the same plane; the angle β between the airfoil chord of the cross section at 1 / 2 wing height of the airfoil fin and the airfoil chord of the upper end surface of the airfoil fin in the vertical direction ranges from 0 to 180°.

[0024] Furthermore, the angle α between the airfoil chord of the upper end surface of the airfoil fin and the airfoil chord of the cross section at 1 / 2 wing height of the airfoil fin in the horizontal direction ranges from 0 to 180°; the angle β between the airfoil chord of the cross section at 1 / 2 wing height of the airfoil fin and the airfoil chord of the upper end surface of the airfoil fin in the vertical direction ranges from 0 to 180°.

[0025] Furthermore, the longitudinally adjacent high-temperature airfoil fins have the same structure; the longitudinally adjacent low-temperature airfoil fins have the same structure;

[0026] In the laterally adjacent high-temperature airfoil fin and low-temperature airfoil fin, the angles between the airfoil chord of the upper end surface of the airfoil fin and the airfoil chord of the cross section at 1 / 2 wing height of the airfoil fin in the horizontal direction are α1 and α2 respectively, and α1 and α2 are complementary angles to each other.

[0027] Furthermore, the longitudinally adjacent high-temperature airfoil fins have the same structure; the longitudinally adjacent low-temperature airfoil fins have the same structure;

[0028] In the laterally adjacent high-temperature airfoil fin and low-temperature airfoil fin, the included angles in the vertical direction between the airfoil chord of the cross section at 1 / 2 wing height of the airfoil fin and the airfoil chord of the upper end surface of the airfoil fin are β1 and β2 respectively, and β1 and β2 are complementary angles to each other.

[0029] The present invention also provides a three-dimensional variable-section airfoil fin heat exchange plate, comprising: a three-dimensional variable-section airfoil fin heat exchange plate core structure according to any one of claims 1 to 9.

[0030] Compared with the prior art, the present invention has the following beneficial technical effects:

[0031] The three-dimensional variable-section airfoil fin heat exchange plate and core structure proposed in this invention, compared to traditional airfoil fins, optimizes the horizontal cross-sectional area in the middle of the airfoil's mid-section. This results in a concave shape, a more streamlined outer surface of the fluid, and reduced flow retardation at the airfoil's leading edge, effectively reducing flow resistance in the airfoil channel. By optimizing the angle of the horizontal middle cross-sectional area in the middle of the airfoil's mid-section, the fluid is guided to achieve horizontal and vertical velocity pulsations, thereby improving the heat exchange performance of the airfoil channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The diagram is a schematic diagram of the core structure of a three-dimensional variable-section airfoil fin printed circuit board heat exchanger according to an embodiment;

[0033] Figure 2 is a schematic structural diagram of a hot side heat exchange plate of an embodiment;

[0034] Figure 3 is a schematic structural diagram of a cold-side heat exchange plate according to an embodiment;

[0035] Figure 4 This is a schematic diagram of the structure and dimensions of an airfoil fin according to an embodiment;

[0036] Figure 5 Schematic diagram of a three-dimensional variable cross-section I-shaped airfoil fin structure according to an embodiment;

[0037] Figure 6 A schematic diagram of a three-dimensional variable cross-section II airfoil fin structure according to an embodiment;

[0038] Figure 7 A schematic diagram of a three-dimensional variable cross-section III airfoil fin structure according to an embodiment;

[0039] Figure 8 A schematic diagram of a three-dimensional variable cross-section IV airfoil fin structure according to an embodiment;

[0040] Figure 9 A schematic diagram of the arrangement of a three-dimensional variable cross-section II airfoil fin structure according to an embodiment;

[0041] Figure 10 This is a schematic diagram of the arrangement of a three-dimensional variable cross-section III airfoil fin structure according to an embodiment.

[0042] Figure markings: 1-hot side heat exchange plate, 2-cold side heat exchange plate, 13-high temperature wing-shaped fin, 23-low temperature wing-shaped fin, 14-high temperature fluid inlet guide fin, 15-high temperature fluid outlet guide fin, 24-low temperature fluid inlet guide fin, 25-low temperature fluid outlet guide fin, 6-hot fluid inlet circular hole, 7-hot fluid outlet circular hole, 8-cold fluid inlet circular hole, 9-cold fluid outlet circular hole, 11-hot side heat exchange plate body, 21-cold side heat exchange plate body, S1-wing-shaped fin upper end surface, S2-wing-shaped fin 1 / 2 wing height cross section, S3-wing-shaped fin lower end surface. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0044] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] refer to Figure 1 As shown, Figure 1 The figure is a schematic diagram of the core structure of a three-dimensional variable cross-section airfoil fin printed circuit board heat exchanger according to an embodiment. Figure 1 As shown, a three-dimensional variable-section airfoil fin heat exchange plate core structure includes: a stacked hot-side heat exchange plate 1 and a cold-side heat exchange plate 2; the hot-side heat exchange plate 1 and the cold-side heat exchange plate 2 are spaced apart from each other on the upper and lower surfaces to form alternating high-temperature fluid channels and low-temperature fluid channels;

[0046] Figure 2 The figure is a schematic structural diagram of a hot-side heat exchange plate according to an embodiment. The hot-side heat exchange plate 1 comprises: a hot-side heat exchange plate body 11; a hot fluid inlet circular hole 6 and a hot fluid outlet circular hole 7, respectively disposed at both ends of the main diagonal of the hot-side heat exchange plate 1; a cold fluid inlet circular hole 8 and a cold fluid outlet circular hole 9, respectively disposed at both ends of the secondary diagonal of the hot-side heat exchange plate 1; and a plurality of high-temperature airfoil fins 13 arranged in rows within the hot-side heat exchange plate body 11 along the flow direction of the high-temperature fluid; the hot fluid inlet circular hole 6 and the cold fluid outlet circular hole 9 are located on the same side of the plurality of high-temperature airfoil fins 13; and the hot fluid outlet circular hole 7 and the cold fluid inlet circular hole 8 are located on the same side of the plurality of high-temperature airfoil fins 13.

[0047] The tips of the plurality of high-temperature airfoil fins 13 are all directed toward the outlet of the high-temperature fluid channel;

[0048] Figure 3 The figure is a schematic structural diagram of a cold-side heat exchange plate according to an embodiment. The cold-side heat exchange plate 2 comprises: a cold-side heat exchange plate body 21; a cold fluid inlet circular hole 8 and a cold fluid outlet circular hole 9, respectively disposed at both ends of the main diagonal of the cold-side heat exchange plate 2; a hot fluid inlet circular hole 6 and a hot fluid outlet circular hole 7, respectively disposed at both ends of the secondary diagonal of the cold-side heat exchange plate 2; and a plurality of low-temperature airfoil fins 23 arranged in rows within the cold-side heat exchange plate body 21 along the flow direction of the low-temperature fluid; the hot fluid inlet circular hole 6 and the cold fluid outlet circular hole 9 are located on the same side of the plurality of low-temperature airfoil fins 23; and the hot fluid outlet circular hole 7 and the cold fluid inlet circular hole 8 are located on the same side of the plurality of low-temperature airfoil fins 23.

[0049] The tips of the plurality of low-temperature airfoil fins 23 are all directed toward the outlet of the low-temperature fluid channel.

[0050] The high-temperature airfoil fin 13 and the low-temperature airfoil fin 23 have the same structure and a NACA airfoil cross section. Figure 5 FIG is a schematic diagram of a three-dimensional variable cross-section I-shaped fin structure according to an embodiment. Figure 5 As shown, the high-temperature airfoil fin 13 and the low-temperature airfoil fin 23 include: an airfoil upper end surface S1, a cross section S2 at the 1 / 2 wing height of the airfoil fin, and an airfoil lower end surface S3; the areas of the airfoil upper end surface S1 and the airfoil lower end surface S3 are equal; the airfoil upper end surface S1 and the airfoil lower end surface S3 are parallel to each other; the airfoil chord of the airfoil upper end surface S1 and the airfoil lower end surface S3 are parallel to each other; the airfoil chord of the airfoil lower end surface S3 is parallel to each other; the airfoil chord of the airfoil upper end surface S1 is parallel to the airfoil chord of the airfoil lower end surface S3; the airfoil chord of the 1 / 2 wing is parallel to each other. The area ratio of the high cross section S2 to the upper end surface S1 of the airfoil fin is: 0.25~0.8; the side walls of the upper end surface S1 and the lower end surface S3 of the airfoil fin connected to the cross section S2 at the height of the 1 / 2 wing of the airfoil fin are both smooth curved transitions; the midpoint of the airfoil chord of the upper end surface S1 of the airfoil fin, the midpoint of the airfoil chord of the lower end surface S3 of the airfoil fin and the midpoint of the airfoil chord of the cross section S2 at the height of the 1 / 2 wing of the airfoil fin are projected in the vertical direction to coincide.

[0051] In one embodiment, the hot side heat exchange plate 1 further includes a plurality of high temperature fluid inlet guide fins 14 and a plurality of high temperature fluid outlet guide fins 15; the cold side heat exchange plate 2 further includes a plurality of low temperature fluid inlet guide fins 24 and a plurality of low temperature fluid outlet guide fins 25;

[0052] The several high-temperature fluid inlet guide vanes 14 and the several high-temperature fluid outlet guide vanes 15 are respectively arranged on both sides of the several high-temperature airfoil vanes 13; the several high-temperature fluid inlet guide vanes 14 are located on the side close to the hot fluid inlet circular hole 6; the several high-temperature fluid outlet guide vanes 15 are located on the side close to the hot fluid outlet circular hole 7;

[0053] The several low-temperature fluid inlet guide vanes 24 and the several low-temperature fluid outlet guide vanes 25 are respectively arranged on both sides of the several low-temperature airfoil vanes 23; the several low-temperature fluid inlet guide vanes 24 are located on the side close to the cold fluid inlet circular hole 8, and the several low-temperature fluid outlet guide vanes 25 are located on the side close to the cold fluid outlet circular hole 9;

[0054] The number of the several high-temperature fluid inlet guide vanes 14 is equal to the number of columns of the several high-temperature airfoil vanes 13; the several high-temperature fluid inlet guide vanes 14 correspond to the several high-temperature airfoil vanes 13 column by column, and the center line of each high-temperature fluid inlet guide vane 14 is on the same straight line as the center line of the high-temperature airfoil vane 13 in the column;

[0055] The number of the several high-temperature fluid outlet guide vanes 15 is equal to the number of columns of the several high-temperature airfoil vanes 13; the several high-temperature fluid outlet guide vanes 15 correspond to the several high-temperature airfoil vanes 13 column by column, and the center line of each high-temperature fluid outlet guide vane 15 is on the same straight line as the center line of the high-temperature airfoil vane 13 in the column;

[0056] The number of the several low-temperature fluid inlet guide vanes 24 is equal to the number of columns of the several low-temperature airfoil vanes 23; the several low-temperature fluid inlet guide vanes 24 correspond to the several low-temperature airfoil vanes 23 column by column, and the center line of each low-temperature fluid inlet guide vane 24 is on the same straight line as the center line of the low-temperature airfoil vane 23 in the column;

[0057] The number of the several low-temperature fluid outlet guide vanes 25 is equal to the number of columns of the several low-temperature airfoil vanes 23; the several low-temperature fluid outlet guide vanes 25 correspond to the several low-temperature airfoil vanes 23 column by column, and the center line of each low-temperature fluid outlet guide vane 25 is on the same straight line as the center line of the low-temperature airfoil vane 23 in the column.

[0058] Figure 4 An airfoil vane structure size schematic diagram of an embodiment. As shown in FIG. 1, the airfoil vane structure is composed of a plurality of high-temperature airfoil vanes 13, a plurality of low-temperature airfoil vanes 23, a plurality of high-temperature fluid inlet guide vanes 14, a plurality of high-temperature fluid outlet guide vanes 15, a plurality of low-temperature fluid inlet guide vanes 24, and a plurality of low-temperature fluid outlet guide vanes 25. Figure 4As shown, in one embodiment, the high-temperature airfoil fins 13 and the low-temperature airfoil fins 23 are arranged in a sequential or staggered arrangement, and the longitudinal spacing La between adjacent high-temperature airfoil fins 13 or low-temperature airfoil fins 23 ranges from 5 to 30 mm, and the transverse spacing Ls ranges from 2 to 10 mm. In one embodiment, the longitudinal spacing La between the high-temperature airfoil fins 13 or low-temperature airfoil fins 23 is 3 mm, and the transverse spacing Ls between the fins is 12 mm.

[0059] In one embodiment, the hot side heat exchange plate 1 and the cold side heat exchange plate 2 are connected by diffusion welding; the high temperature airfoil fin 13 and the low temperature airfoil fin 23 are formed by photochemical etching;

[0060] The thickness of the hot side heat exchange plate 1 and the cold side heat exchange plate 2 is in the range of 3 to 5 mm.

[0061] The length L of the high-temperature airfoil fin 13 and the low-temperature airfoil fin 23 c Range: 2~10mm; width L t The range is: 0.5~3mm; the range of fin height H is: 1~3mm. In one embodiment, the length Lc of the high temperature airfoil fin 13 and the low temperature airfoil fin 23 is 6mm, and the width Lt is 1.1mm.

[0062] Figure 6 FIG. 1 is a schematic diagram of a three-dimensional variable cross-section II airfoil fin structure according to an embodiment. Figure 6 As shown, in one embodiment, the upper end surface S1 of the airfoil fin and the cross section S2 of the airfoil fin at half the wing height are parallel to each other; the angle α between the airfoil chord of the upper end surface S1 and the airfoil chord of the cross section S2 at half the wing height in the horizontal direction ranges from 0 to 180°. In one embodiment, α1 and α2 are 15° and 165°, respectively.

[0063] Figure 7 FIG. 1 is a schematic diagram of a three-dimensional variable cross-section III airfoil fin structure according to an embodiment. Figure 7 As shown, in one embodiment, the airfoil chord of the upper end surface S1 of the airfoil profile fin, the airfoil chord of the lower end surface S3 of the airfoil profile fin, and the airfoil chord of the cross section S2 at half the wing height of the airfoil profile fin are located in the same plane; the vertical angle β between the airfoil chord of the cross section S2 at half the wing height of the airfoil profile fin and the airfoil chord of the upper end surface S1 of the airfoil profile fin is in the range of 0 to 180°. In one embodiment, β1 and β2 are 10° and 170°, respectively.

[0064] Figure 8 FIG. 1 is a schematic diagram of a three-dimensional variable cross-section IV airfoil fin structure according to an embodiment. Figure 8As shown in the drawings, in one embodiment, the included angle a between the wing-type fin upper end surface S1 wing chord and the wing-type fin 1 / 2 fin height cross-section S2 wing chord in the horizontal direction ranges from 0 to 180°; the included angle β between the wing-type fin 1 / 2 fin height cross-section (S2) wing chord and the wing-type fin upper end surface S1 wing chord in the vertical direction ranges from 0 to 180°.

[0065] Figure 9 The structural arrangement diagram of the three-dimensional variable cross-section II wing-type fin in one embodiment is shown in the drawings. Figure 9 As shown in the drawings, in one embodiment, the high-temperature wing-type fins 13 are structurally identical in the longitudinal direction; the low-temperature wing-type fins 23 are structurally identical in the longitudinal direction.

[0066] Among the high-temperature wing-type fins 13 and the low-temperature wing-type fins 23 that are transversely adjacent, the included angles between the wing-type fin upper end surface S1 wing chord and the wing-type fin 1 / 2 fin height cross-section S2 wing chord in the horizontal direction are a1 and a2 respectively, and a1 and a2 are supplementary angles.

[0067] In one embodiment, the high-temperature wing-type fins 13 are structurally identical in the longitudinal direction; the low-temperature wing-type fins 23 are structurally identical in the longitudinal direction.

[0068] Among the high-temperature wing-type fins 13 and the low-temperature wing-type fins 23 that are transversely adjacent, the included angles between the wing-type fin 1 / 2 fin height cross-section S2 wing chord and the wing-type fin upper end surface S1 wing chord in the vertical direction are b1 and b2 respectively, and b1 and b2 are supplementary angles.

[0069] Figure 10 The structural arrangement diagram of the three-dimensional variable cross-section III wing-type fin in one embodiment is shown in the drawings. Figure 10 As shown in the drawings, in one embodiment, a three-dimensional variable cross-section wing-type fin heat exchange plate is provided, which includes any one of the three-dimensional variable cross-section wing-type fin heat exchange plate core structures in the above embodiments.

[0070] The hot-side heat exchange plate 1 and the cold-side heat exchange plate 2 are connected by diffusion welding, and the fluid exchanges heat with the hot-side heat exchange plate 1 and the cold-side heat exchange plate 2 through the wing-type channels. Compared with the conventional wing-type fin structure, the three-dimensional variable cross-section I wing-type fin structure is concave as a whole, the fluid outer-sweeping surface is more excellent in streamline type, the flow resistance effect of the airflow at the wing-type leading edge is weakened, and the fluid resistance can be further reduced under the premise of ensuring the heat exchange performance. The three-dimensional variable cross-section II, three-dimensional variable cross-section III, and three-dimensional variable cross-section IV wing-type fin structures can enhance the speed pulsation of the fluid in the horizontal direction and the vertical direction in the channel, and thus improve the heat transfer effect.

[0071] Any technical features in the above-described embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations are described, however, it is understood that the scope of the present specification includes all possible combinations.

[0072] It should be noted that the terms "first", "second", and "third" in the embodiments of the present application are merely used to distinguish similar objects, and do not represent a specific order of the objects. Understandably, the terms "first", "second", and "third" can be interchanged in a specific order or sequence as long as the interchanging does not cause contradiction. It should be understood that the objects distinguished by "first", "second", and "third" can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0073] The terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, device, product, or apparatus that includes a series of steps or modules is not limited to the listed steps or modules, but can optionally include steps or modules not listed, or can optionally include other steps or modules inherent to the process, method, product, or apparatus.

[0074] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A three-dimensional variable cross-section airfoil fin heat exchange plate core structure, characterized in that: include: Hot-side heat exchange plates (1) and cold-side heat exchange plates (2) are stacked; the hot-side heat exchange plates (1) and cold-side heat exchange plates (2) are spaced apart from each other above and below each other to form alternating high-temperature fluid channels and low-temperature fluid channels; The hot side heat exchange plate (1) comprises: a hot side heat exchange plate body (11), a hot fluid inlet circular hole (6) and a hot fluid outlet circular hole (7) respectively arranged at both ends of a main diagonal line of the hot side heat exchange plate (1), a cold fluid inlet circular hole (8) and a cold fluid outlet circular hole (9) respectively arranged at both ends of a secondary diagonal line of the hot side heat exchange plate (1), and a plurality of high-temperature wing-shaped fins (13) arranged in rows in the hot side heat exchange plate body (11) along the flow direction of the high-temperature fluid; the hot fluid inlet circular hole (6) and the cold fluid outlet circular hole (9) are located on the same side of the plurality of high-temperature wing-shaped fins (13); the hot fluid outlet circular hole (7) and the cold fluid inlet circular hole (8) are located on the same side of the plurality of high-temperature wing-shaped fins (13); The tips of the plurality of high-temperature airfoil fins (13) are all directed toward the outlet of the high-temperature fluid channel; The cold side heat exchange plate (2) comprises: a cold side heat exchange plate body (21), a cold fluid inlet circular hole (8) and a cold fluid outlet circular hole (9) respectively arranged at both ends of the main diagonal of the cold side heat exchange plate (2), a hot fluid inlet circular hole (6) and a hot fluid outlet circular hole (7) respectively arranged at both ends of the secondary diagonal of the cold side heat exchange plate (2), and a plurality of low-temperature wing-shaped fins (23) arranged in rows in the cold side heat exchange plate body (21) along the flow direction of the low-temperature fluid; the hot fluid inlet circular hole (6) and the cold fluid outlet circular hole (9) are located on the same side of the plurality of low-temperature wing-shaped fins (23); the hot fluid outlet circular hole (7) and the cold fluid inlet circular hole (8) are located on the same side of the plurality of low-temperature wing-shaped fins (23); The tips of the plurality of low-temperature airfoil fins (23) are all directed toward the outlet of the low-temperature fluid channel; The high-temperature airfoil fin (13) and the low-temperature airfoil fin (23) have the same structure and a NACA airfoil cross section; the high-temperature airfoil fin (13) and the low-temperature airfoil fin (23) comprise: an airfoil upper end surface (S1), a cross section at 1 / 2 wing height of the airfoil fin (S2) and an airfoil lower end surface (S3); the areas of the airfoil upper end surface (S1) and the airfoil lower end surface (S3) are equal; the airfoil upper end surface (S1) and the airfoil lower end surface (S3) are parallel to each other; the airfoil chord of the airfoil upper end surface (S1) and the airfoil lower end surface (S3) are equal ... The chords of the airfoils are parallel to each other; the area ratio of the cross section (S2) at the half wing height of the airfoil fin to the upper end surface (S1) of the airfoil fin is 0.25 to 0.8; the side walls of the upper end surface (S1) and the lower end surface (S3) of the airfoil fin connected to the cross section (S2) at the half wing height of the airfoil fin are both smooth curved transitions; the midpoint of the airfoil chord of the upper end surface (S1) of the airfoil fin, the midpoint of the airfoil chord of the lower end surface (S3) of the airfoil fin, and the midpoint of the airfoil chord of the cross section (S2) at the half wing height of the airfoil fin are vertically projected to coincide; The spatial positional relationship between the upper end surface (S1) of the airfoil fin, the cross section (S2) at the 1 / 2 wing height of the airfoil fin, and the lower end surface (S3) of the airfoil fin satisfies any one of the following conditions A, B, and C: A: The upper end surface (S1) of the airfoil fin and the cross section (S2) at the half wing height of the airfoil fin are parallel to each other; the angle α between the airfoil chord of the upper end surface (S1) of the airfoil fin and the airfoil chord of the cross section (S2) at the half wing height of the airfoil fin in the horizontal direction is greater than 0 degrees and less than or equal to 180 degrees; B: The airfoil chord of the upper end surface (S1) of the airfoil fin, the airfoil chord of the lower end surface (S3) of the airfoil fin and the airfoil chord of the cross section (S2) at 1 / 2 wing height of the airfoil fin are located in the same plane; the included angle β between the airfoil chord of the cross section (S2) at 1 / 2 wing height of the airfoil fin and the airfoil chord of the upper end surface (S1) of the airfoil fin in the vertical direction is greater than 0 degrees and less than or equal to 180 degrees; C: The range of the angle α in the horizontal direction between the airfoil chord of the upper end surface (S1) of the airfoil fin and the airfoil chord of the cross section (S2) at 1 / 2 wing height of the airfoil fin is: greater than 0 degree and less than or equal to 180 degrees; the range of the angle β in the vertical direction between the airfoil chord of the cross section (S2) at 1 / 2 wing height of the airfoil fin and the airfoil chord of the upper end surface (S1) of the airfoil fin is: greater than 0 degree and less than or equal to 180 degrees.

2. The three-dimensional variable cross-section airfoil fin heat exchange plate core structure according to claim 1, characterized in that: The hot side heat exchange plate (1) further comprises a plurality of high-temperature fluid inlet guide fins (14) and a plurality of high-temperature fluid outlet guide fins (15); the cold side heat exchange plate (2) further comprises a plurality of low-temperature fluid inlet guide fins (24) and a plurality of low-temperature fluid outlet guide fins (25); The plurality of high-temperature fluid inlet guide fins (14) and the plurality of high-temperature fluid outlet guide fins (15) are respectively arranged on both sides of the plurality of high-temperature airfoil fins (13); the plurality of high-temperature fluid inlet guide fins (14) are located on a side close to the hot fluid inlet circular hole (6); the plurality of high-temperature fluid outlet guide fins (15) are located on a side close to the hot fluid outlet circular hole (7); The plurality of low-temperature fluid inlet guide fins (24) and the plurality of low-temperature fluid outlet guide fins (25) are respectively arranged on both sides of the plurality of low-temperature airfoil fins (23); the plurality of low-temperature fluid inlet guide fins (24) are located on a side close to the cold fluid inlet circular hole (8), and the plurality of low-temperature fluid outlet guide fins (25) are located on a side close to the cold fluid outlet circular hole (9); The number of the high-temperature fluid inlet guide fins (14) is equal to the number of rows of the high-temperature airfoil fins (13); the high-temperature fluid inlet guide fins (14) correspond to the high-temperature airfoil fins (13) in a one-to-one manner, and the center line of each high-temperature fluid inlet guide fin (14) is on the same straight line as the center line of the high-temperature airfoil fin (13) in its row; The number of the high-temperature fluid outlet guide fins (15) is equal to the number of rows of the high-temperature airfoil fins (13); the high-temperature fluid outlet guide fins (15) correspond to the high-temperature airfoil fins (13) in a one-to-one manner, and the center line of each high-temperature fluid outlet guide fin (15) is on the same straight line as the center line of the high-temperature airfoil fin (13) in its row; The number of the plurality of low-temperature fluid inlet guide fins (24) is equal to the number of rows of the plurality of low-temperature airfoil fins (23); the plurality of low-temperature fluid inlet guide fins (24) correspond to the plurality of low-temperature airfoil fins (23) in a row-by-row manner, and the center line of each of the low-temperature fluid inlet guide fins (24) is on the same straight line as the center line of the low-temperature airfoil fins (23) in its row; The number of the plurality of low-temperature fluid outlet guide fins (25) is equal to the number of rows of the plurality of low-temperature wing-shaped fins (23); the plurality of low-temperature fluid outlet guide fins (25) correspond to the plurality of low-temperature wing-shaped fins (23) in a one-to-one manner, and the center line of each of the low-temperature fluid outlet guide fins (25) is on the same straight line as the center line of the low-temperature wing-shaped fins (23) in its row.

3. The three-dimensional variable cross-section airfoil fin heat exchange plate core structure according to claim 2, characterized in that: The high-temperature airfoil fins (13) and the low-temperature airfoil fins (23) are arranged in a sequential or staggered arrangement, and the longitudinal spacing L between adjacent high-temperature airfoil fins (13) or low-temperature airfoil fins (23) is a The range is: greater than or equal to 5mm and less than or equal to 30mm.

4. The three-dimensional variable cross-section airfoil fin heat exchange plate core structure according to claim 3, characterized in that: The hot side heat exchange plate (1) and the cold side heat exchange plate (2) are connected by diffusion welding; the high temperature airfoil fin (13) and the low temperature airfoil fin (23) are formed by photochemical etching; The thickness range of the hot side heat exchange plate (1) and the cold side heat exchange plate (2) is: greater than or equal to 3 mm and less than or equal to 5 mm; The length L of the high-temperature airfoil fin (13) and the low-temperature airfoil fin (23) is c Range: greater than or equal to 2mm, and less than or equal to 10mm; width L t The range is: greater than or equal to 0.5mm and less than or equal to 3mm; the range of fin height H is: greater than or equal to 1mm and less than or equal to 3mm.

5. The three-dimensional variable cross-section airfoil fin heat exchange plate core structure according to claim 1, characterized in that: The longitudinally adjacent high-temperature airfoil fins (13) have the same structure; the longitudinally adjacent low-temperature airfoil fins (23) have the same structure; In the laterally adjacent high-temperature airfoil fin (13) and low-temperature airfoil fin (23), the angles in the horizontal direction between the airfoil chord of the upper end surface (S1) of the airfoil fin and the airfoil chord of the cross section (S2) at 1 / 2 wing height of the airfoil fin are α1 and α2 respectively, and α1 and α2 are complementary angles to each other.

6. The three-dimensional variable cross-section airfoil fin heat exchange plate core structure according to claim 1, characterized in that: The longitudinally adjacent high-temperature airfoil fins (13) have the same structure; the longitudinally adjacent low-temperature airfoil fins (23) have the same structure; In the laterally adjacent high-temperature airfoil fin (13) and low-temperature airfoil fin (23), the included angles in the vertical direction between the airfoil chord of the cross section (S2) at 1 / 2 of the wing height of the airfoil fin and the airfoil chord of the upper end surface (S1) of the airfoil fin are β1 and β2 respectively, and β1 and β2 are complementary angles to each other.

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